基于能量整形的可控制动电阻暂态稳定控制器设计--单机无穷大系统篇

应用能量整形IDA-PBC方法设计了针对电力系统大干扰的可控制动电阻(TCBR)的闭环暂态稳定控制器,能量整形IDA-PBC方法直接使用系统能量作为存储函数,物理意义明确,较其它非线性控制器结构简单,并避免了可能产生的不期望的高增益问题.由于设计中完整地保留了系统非线性结构,不需进行任何线性化处理,较各种线性化设计方法具有更强的鲁棒性,适应系统模型和参数不精确程度效果较好.建立了适合能量整形和考虑系统调节动态的简化TCBR三阶模型,首次提出了用于求解能量整形匹配PDE的待定系数法用以有效设计TCBR闭合连续暂稳控制器,并详细探讨了求解匹配PDE待定系数法的理论基础,文中给出的仿真算例表明所提出的控制器有效可行.

Novel TCBR Controller for Transient Stability Improvement via Energy-Shaping-A SMIB Case

In this paper, a novel TCBR controller is presented for power system transient stability improvement via energy-shaping IDA-PBC method. The proposed IDA-PBC passive stabilizer uses the real energy function of power system as the close-loop Hamiltonian function and in simple structure. Since the system nonlinear characteristics are completely preserved, the proposed TCBR IDA-PBC controller is more robust than linear control method. Also a feasible scheme is proposed to employ the control strategy after considering the physical structure of power system. The main contributions include the establishment of a three-order simplified TCBR model,which is more suitable for energy-shaping method and a consideration of the dynamic effect of TCBR regulation as well. Furthermore, a novel IDA-PBC match PDE solution method is applied to derive the close-loop control law for TCBR. Based on the introduction of a virtual coupling between the electrical and the mechanical dynamics of the power system and the derivation of a new Lyapunov function. The OMIB model is applied in this paper and the multi-machine case will be presented on the next paper. The proposed strategy and method are proved to be effective by the results of digital simulation research done in this paper.